26143421 has 4 divisors (see below), whose sum is σ = 26699712. Its totient is φ = 25587132.

The previous prime is 26143409. The next prime is 26143427. The reversal of 26143421 is 12434162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26143421 - 2¹⁴ = 26127037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26143427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278075 + ... + 278168.

It is an arithmetic number, because the mean of its divisors is an integer number (6674928).

Almost surely, 2^26143421 is an apocalyptic number.

It is an amenable number.

26143421 is a deficient number, since it is larger than the sum of its proper divisors (556291).

26143421 is an equidigital number, since it uses as much as digits as its factorization.

26143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556290.

The product of its digits is 1152, while the sum is 23.

The square root of 26143421 is about 5113.0637586480. The cubic root of 26143421 is about 296.7933315670.

Adding to 26143421 its reverse (12434162), we get a palindrome (38577583).

The spelling of 26143421 in words is "twenty-six million, one hundred forty-three thousand, four hundred twenty-one".